EP 0813759 B1 19981125 - DUAL-WAVELENGTH PUMPED LOW NOISE WAVEGUIDE LASER
Title (en)
DUAL-WAVELENGTH PUMPED LOW NOISE WAVEGUIDE LASER
Title (de)
ZWEIWELLENLÄNGENGEPUMPTER,RAUSCHARMER WELLENLEITERLASER
Title (fr)
LASER POMPE A GUIDE D'ONDE ET FAIBLE BRUIT A DOUBLE LONGUEUR D'ONDE
Publication
Application
Priority
- US 9603273 W 19960306
- US 39893695 A 19950306
Abstract (en)
[origin: WO9627927A1] A dual-wavelength pumped low noise fiber laser includes a fiber laser (10) comprising a pair of Bragg gratings (14, 16) at opposite ends of a fiber laser cavity (18) which is co-doped with two rare-earth dopants, Er<+3>Yb<+3>, so as to allow lasing to occur at a lasing wavelength lambda L. A first pump signal (20) efficiently pumps the Yb to the excited state and the Yb energy is transitioned to the Er atoms which ultimately lase at the desire lasing frequency. Because Yb is pumped so efficiently, high pump absorption is achieved, thereby providing high laser output power and, consequently, reduced RIN. Simultaneously, a second pump signal (52) directly pumps the Er at a different wavelength lambda P2 which populates the lasing transition more quickly, thereby allowing sufficient bandwidth of a closed loop control on the second pump signal (52) to control low frequency RIN spiking due to relaxation oscillations in the laser.
IPC 1-7
IPC 8 full level
H01S 3/06 (2006.01); H01S 3/067 (2006.01); H01S 3/094 (2006.01); H01S 3/131 (2006.01); H01S 3/16 (2006.01)
CPC (source: EP US)
H01S 3/067 (2013.01 - EP US); H01S 3/0675 (2013.01 - EP US); H01S 3/06754 (2013.01 - EP US); H01S 3/094096 (2013.01 - EP US); H01S 3/1312 (2013.01 - EP US); H01S 3/1608 (2013.01 - EP US); H01S 3/1618 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 9627927 A1 19960912; CA 2212434 A1 19960912; CA 2212434 C 20050531; DE 69601034 D1 19990107; DE 69601034 T2 19990415; EP 0813759 A1 19971229; EP 0813759 B1 19981125; ES 2125723 T3 19990301; JP 3933199 B2 20070620; JP H11501770 A 19990209; US 5594747 A 19970114
DOCDB simple family (application)
US 9603273 W 19960306; CA 2212434 A 19960306; DE 69601034 T 19960306; EP 96910408 A 19960306; ES 96910408 T 19960306; JP 52707996 A 19960306; US 39893695 A 19950306